[PATCH 0/7] 32-bit lseek and /dev/mem fixes/improvements

[Andrey Smirnov <andrew.smirnov@gmail.com>]

Everyone:

This series is a result of my attempt to fix a regression in lseek()
on 32-bit platforms. The regression manifested in lseek() unable to
seek past ~4GiB mark caused and was caused by usage of IS_ERR_VALUE()
(see commit messages for more detailed explanation). My goal was to
both get rid of IS_ERR_VALUE() while still make it possible to access
all 64-bits of address space via /dev/mem on 64-bit machines.

First three commits are optional and can be dropped.

Feedback is welcome!

Thanks,
Andrey Smirnov

Andrey Smirnov (7):
  commands: Move mem_parse_options() to lib/misc.c
  commands: Get rid of mem_rw_buf
  commands: Move /dev/mem driver to drivers/misc
  fs: Change error checking logic for fsdrv->lseek() call
  fs: Calculate new position before validtiy check in lseek()
  fs: Add support for files larger than MAX_LFS_FILESIZE
  misc: mem: Set correct size for /dev/mem

 commands/Kconfig      |  17 +++---
 commands/Makefile     |   1 -
 commands/md.c         |  12 +++--
 commands/mem.c        | 123 ------------------------------------------
 commands/memcmp.c     |  16 +++---
 commands/memcpy.c     |  10 ++--
 commands/memset.c     |   2 -
 common/ratp/md.c      |   9 ++--
 drivers/misc/Kconfig  |   3 ++
 drivers/misc/Makefile |   1 +
 drivers/misc/mem.c    |  45 ++++++++++++++++
 fs/devfs.c            |   2 +
 fs/fs.c               |  48 +++++++++++------
 include/driver.h      |   1 +
 include/fs.h          |   1 +
 lib/misc.c            |  42 +++++++++++++++
 16 files changed, 160 insertions(+), 173 deletions(-)
 delete mode 100644 commands/mem.c
 create mode 100644 drivers/misc/mem.c

-- 
2.20.1


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